Note on White Balance

The first batch of negatives we did on the lightbox had a corner cut out on every negative, and we were able to use that exposed area of the lightbox surface to get white balance for each item; this is what you should do if possible

If at least one image of the batch you're doing shows through some of the lightbox, use that exposed area to white balance that image, then copy that white balance over to the rest of the images in the set

If no images show any background, you'll need to take an additional image specifically for white balance purposes -- just pull back the masking paper to expose some of the background and use that for white balancing the set